<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>footer</title>
    <style >
        .warpper {
            margin: 0 auto;
            position: relative;
            background-color: slategray;
            height: 72px;
        }

        .content {
            /*height: 50px;*/
            color: white;
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            text-align: center;
        }
        .content>a{
            text-decoration: none;
            color: #FF5722;
        }

    </style>
</head>
<body>
<div class="warpper">
    <div class="content">
        Copyright © 2020-2021 源梦科技. All Rights Reserved &emsp;<a  href="#"> 关于我们</a>
    </div>
</div>

</body>
</html>